1	"Branchlets glabrous to thinly pubescent"	2
1	"Branchlets densely pubescent to tomentose"	3
2	"Pods glabrous, with straight or crenate margins"	"Vachellia nilotica subsp. leiocarpa"
2	"Pods white-tomentose, narrowly and irrregularly constricted between the seeds"	"Vachellia nilotica subsp. indica"
3	"Pods more or less densely pubescent with straight or crenate margins"	"Vachellia nilotica subsp. subalata"
3	"Pods white tomentose, with distinctly and often irregularly crenate margins"	"Vachellia nilotica subsp. adstringens"